Valve-grinding tool.



J. KOLETAR & J. FEKETB. VALVE GRINDING TOOL. APPLICATION FILED JAN. 23, 1914.

1,09%652, Patented Apr. 7, 19M

HHHHHII l vi/lwmooaa SWMJCOUL Jbh w JFYre Fe JOSEPH KOLETAR AND JOHN FEKETE, 0F BBIDGEPORT, CONNECTICUT.

VALVE-GRINDING TOOL.

Specification of Letters Patent.

. ]Patented Apr. 7, 191%.

Application filed January 23, 1914. Serial No. 813,837.'

' To all whom it may concern:

regrinding valve seats of gasolene motors,

and it especially refers to what are known as hand grinding tools.

The object of the invention is to produce a simple and inexpensive form of valve grinder that can be used to advantage in connection with the grinding of valve seats of various styles of gasolene motors; to provide a tool which is especially convenlent and adapted for grinding seats of certain forms of motors where but a limited amount of space is available for the use of the tool; further to provide a tool which can be made to produce either an oscillatory or rotary movement and whereby the valve may be properly ground to its seat; finally to provide a valve grinder in connection with which extension tools may be used so as to further and better adapt it to various forms of motors and conditions which are found to exist in the numerous automobile constructions.

\Vith these general objects in view and others as will appear the invention consists in certain novel and peculiar features of construction as will hereinafter be more fully described and claimed and in order that it may be more fully understoodrefee. ence is hereby had to the accompanying sheet of drawings forminga part of this specification and upon wh1ch Figure 1 shows a side elevation of our improved valve grinder complete an extension blade-being indicated in dotted lines inconnection therewith. Fig. 2 is a bottom plan view of the invention asshown in Fig. 1. Fig. 3 is a slightly enlarged detail vertical sectional view taken on line 3-3 of Fig. 1,

and Fig. 4 is a detached side elevation of the extension blade adapted to be used in connection with the tools shown in Fig. 1.

Referring in detail to the characters of reference marked upon the drawings 5 represents the main body of the valve grinder and which as shown is in the form of a crank and includes an upwardly extended round pivotal stem 6 over which the hollow shank 7 of the handle 8 extends. A round cross bar 9 forms a part of the crank and joins the outer end portions of the two horizontally disposed members together and serves as .a means for the pivotal attach ment of the shank 10 of the operating handle 11. This bearing is thus obviously arranged ofi from the axis of rotation of the tool and forms a leverage for the operation of the same. The lower portion or head of the tool is provided with a pair of downwardly extended fingers 1212 and whose ends are properly spaced one from the other to engage holes formed in the top of the valve to be ground, and not shown, thus providing for the direct attachment of the grinder to the valve in such cases as where the tool can be brought into close relation with the valve. These fingers are obviously arranged at an equal distance from the center or'axis of rotation of the grinder so that the axis of rotation of the valve will be 1directly beneath that of the grinding too We also provide in connection with our valve grinder an extension blade 13 as shown in Figs. 1 and 4 which is designed to be attached to the grinder proper and is to be used in connection with the same for the grinding of valves in such places and where the tool proper cannot be brought into close relation with the valve as above suggested. This extension blade is shown in both Figs. 1 and 4. and includes extended fingers 12 for engagement with the holes in the valve and also a reduced shank end 14 that fits into an elongated slot or pocket 15 formed in the lower portion of the lower bridge of the grinder and directly in line with the opening or space formed between the before mentioned fingers 12. A screw 16 is seated in the body of the grinder and in line with the said pocket soas to engage the hole 17 in the shank of the extension blade when the lat-ter is shoved into position. This obviously serves to securely hold the blade in position when desired.

It is especially desirable in connection with a tool of this sort to employ an operating handle of the general. type shown and which may be disposed outward to one side I and crank as thus constructed is con1para tively small, thus again 'r'naking it necessary to employ a handle of this kind and in order to produce a valve grinder as before stated which may be arranged and operated in a comparatively small space.

In operating our improved grinder the handle 8 of the same is supported by one hand of the operator directly in line and above the valve to be ground, while the lower portions or fingers 12 are set into en gagem'ent therewith. The other hand of. the operator engages the handle 11 so that the same may be worked either directly forward or backward or given a forward and backward swinging movement in a way to throw the crank completely around and impart to the grinder continuous rotary moveintegraland downwardly extended fingers for engagement with a valve, a pivotal bar forming the bearing of the crank, an outwardly disposed handle pivotally connected to the said bar, and a handle rotatably con nected to the upwardlyextended pivotal member of the body of the grinder.

2. A valve grinder comprising a body forming a crank and including a head having downwardly extended finger ends and having a pocket arranged in said head above and between the said fingers to accommodate an extension blade, a handle connected to the upper portion of the body and in line with thesaid pocket of the head, and an outwardly extended operating handle pivotally connected to the bottom of the said crank.

Signed at Bridgeport in the county of Fairfield and State of Connecticut this 17th day of January A. D., 1914.

v JOSEPH KOLETAR.

JOHN FEKETE. \Vitncsses C. M. NEWMAN, Burn M. \Voumm. 

